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William Blair & Company

William Blair & Company Portfolio holdings

AUM $34.9B
1-Year Est. Return 18.88%
This Fund
S&P 500
This Quarter Est. Return
+1.73%
1 Year Est. Return
+18.88%
3 Year Est. Return
+73.84%
5 Year Est. Return
+90.13%
10 Year Est. Return
+563.35%
AUM
$37.3B
AUM Growth
-$310M
Cap. Flow
-$212M
Cap. Flow %
-0.57%
Top 10 Hldgs %
27.41%
Holding
1,963
New
120
Increased
759
Reduced
753
Closed
96

Top Buys

Rank Stock Value
1
BWXT icon
BWX Technologies
BWXT
+$46.6M
2
META icon
Meta Platforms (Facebook)
META
+$38.3M
3
NOW icon
ServiceNow
NOW
+$37.6M
4
VEU icon
Vanguard FTSE All-World ex-US ETF
VEU
+$32.4M
5
GLD icon
SPDR Gold Trust
GLD
+$29.4M

Top Sells

Rank Stock Value
1
FISV
Fiserv Inc
FISV
+$114M
2
CSGP icon
CoStar Group
CSGP
+$78.3M
3
CWAN
Clearwater Analytics
CWAN
+$75.3M
4
POOL icon
Pool Corp
POOL
+$54M
5
ZTS icon
Zoetis
ZTS
+$51.3M

Sector Composition

Rank Sector Weight
1 Technology 25.8%
2 Financials 13.4%
3 Industrials 12.04%
4 Healthcare 11.22%
5 Communication Services 7.63%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
CHTR icon
1876
Charter Communications
CHTR
$18.2B
– –
-731
Closed -$201K
CNC icon
1877
Centene
CNC
$32.5B
– –
-7,038
Closed -$251K
CNNE icon
1878
Cannae Holdings
CNNE
$649M
– –
-20,509
Closed -$376K
CNP icon
1879
CenterPoint Energy
CNP
$26.8B
– –
-9,542
Closed -$370K
CSL icon
1880
Carlisle Companies
CSL
$15.4B
– –
-687
Closed -$226K
CUBE icon
1881
CubeSmart
CUBE
$9.41B
– –
-5,203
Closed -$212K
DPZ icon
1882
Domino's
DPZ
$11.6B
– –
-494
Closed -$213K
DV icon
1883
DoubleVerify
DV
$2.03B
– –
-72,071
Closed -$863K
DXD icon
1884
ProShares UltraShort Dow 30
DXD
$42.2M
– –
-12
Closed -$264
ECAT icon
1885
BlackRock ESG Capital Allocation Term Trust
ECAT
$1.56B
– –
-11,871
Closed -$195K
EQH icon
1886
Equitable Holdings
EQH
$14.1B
– –
-5,937
Closed -$301K
EWJV icon
1887
iShares MSCI Japan Value ETF
EWJV
$756M
– –
-1,750
Closed -$68.3K
EXR icon
1888
Extra Space Storage
EXR
$31.6B
– –
-1,485
Closed -$209K
FDUS icon
1889
Fidus Investment
FDUS
$772M
– –
-9,883
Closed -$200K
FSIG icon
1890
First Trust Limited Duration Investment Grade Corporate ETF
FSIG
$1.52B
– –
-694
Closed -$13.3K
GLDG
1891
GoldMining Inc
GLDG
$219M
– –
-20,000
Closed -$24.6K
GLOB icon
1892
Globant
GLOB
$1.61B
– –
-5,033
Closed -$289K
GME icon
1893
GameStop
GME
$8.6B
– –
-10,311
Closed -$281K
GNTX icon
1894
Gentex
GNTX
$5.07B
– –
-7,070
Closed -$200K
GO icon
1895
Grocery Outlet
GO
$980M
– –
-10,000
Closed -$161K
GPN icon
1896
Global Payments
GPN
$22.8B
– –
-3,779
Closed -$314K
HST icon
1897
Host Hotels & Resorts
HST
$16B
– –
-14,478
Closed -$246K
HUBS icon
1898
HubSpot
HUBS
$10.5B
– –
-715
Closed -$334K
HYLS icon
1899
First Trust Exchange-Traded Fund IV First Trust Tactical High Yield ETF
HYLS
$1.64B
– –
-96
Closed -$4.04K
IBTI icon
1900
iShares iBonds Dec 2028 Term Treasury ETF
IBTI
$1.93B
– –
-1,082
Closed -$24.2K
74 75
76
77 78

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William Blair & Company's Q4 2025 Portfolio in Review

As of Q4 2025, William Blair & Company held 1,963 positions worth $37.3B, down 0.82% from $37.6B the previous quarter. Its ten largest holdings account for 27% of the portfolio.

William Blair & Company's Q4 2025 filing shows 120 new, 759 increased, 753 reduced and 96 closed positions. Its largest new stake was Wingstop: 90,773 shares worth $21.6M. The largest sale was Fiserv Inc, an estimated $114M.

By sector, the portfolio is most concentrated in Technology at 26% of assets, down from 27% a quarter earlier, followed by Financials and Industrials.

  • William Blair & Company's largest Q4 2025 buy was Wingstop: 90,773 shares worth $21.6M.
  • William Blair & Company added most to BWX Technologies in Q4 2025, an estimated $46.6M increase.
  • William Blair & Company's biggest Q4 2025 reduction was Fiserv Inc, cutting an estimated $114M.
  • William Blair & Company fully exited SAP in Q4 2025, selling an estimated $9.19M.
  • William Blair & Company's ten largest holdings make up 27% of its $37.3B portfolio in Q4 2025.
  • William Blair & Company opened 120 new positions and closed 96 in Q4 2025.
  • William Blair & Company's portfolio value fell 0.82% quarter-over-quarter to $37.3B.

Based on William Blair & Company's 13F filing for Q4 2025, filed 17 Feb 2026.